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| author | Gert Doering | 2020-09-17 10:59:41 +0200 |
|---|---|---|
| committer | Gert Doering | 2020-09-17 17:41:50 +0200 |
| commit | 4dff236811a1ec9c97a27ad93182ad4beb12377f (patch) | |
| tree | 765d9b0e89b058ccd9665d3782bdee1933b4fe13 /doc/man-sections/server-options.rst | |
| parent | 3ad86c2534a92af137809b6d446d570193e6d01f (diff) | |
| download | openvpn-4dff236811a1ec9c97a27ad93182ad4beb12377f.zip openvpn-4dff236811a1ec9c97a27ad93182ad4beb12377f.tar.gz | |
If IPv6 pool specification sets pool start to ::0 address, increment.
The first IPv6 address in a subnet is not usable (IPv6 anycast address),
but our pool code ignored this.
Instead of assigning an unusable address or erroring out, just log the
fact, and increment the pool start to <pool_base>::1
NOTE: this is a bit simplistic. A pool that is larger than /96 and
has non-0 bits in the "uppermost bits" will still get the increment
as we only look at the lowermost 32 bits.
NOTE2: if the pool is specified with "--server-ipv6 $base/$bits", this
is a non-issue, as the address for the pool start will be incremented
anyway.
v2: make comment more explicit about "we're only talking about the
host part here" and "base sees only only 32 bit of the host part"
Reported-by: NicolaF_ in Trac
Trac: #1282
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Antonio Quartulli <a@unstable.cc>
Message-Id: <20200917085941.20972-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg21039.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Diffstat (limited to 'doc/man-sections/server-options.rst')
| -rw-r--r-- | doc/man-sections/server-options.rst | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/man-sections/server-options.rst b/doc/man-sections/server-options.rst index fe0e6a9..c0b22a5 100644 --- a/doc/man-sections/server-options.rst +++ b/doc/man-sections/server-options.rst @@ -204,7 +204,8 @@ fast hardware. SSL/TLS authentication must be used in this mode. ifconfig-ipv6-pool ipv6addr/bits The pool starts at ``ipv6addr`` and matches the offset determined from - the start of the IPv4 pool. + the start of the IPv4 pool. If the host part of the given IPv6 + address is ``0``, the pool starts at ``ipv6addr`` +1. --ifconfig-pool-persist args Persist/unpersist ifconfig-pool data to ``file``, at ``seconds`` |